Then I posted this one onto the "memento" on Wechat, which is the most popular social media my friends and I use. Later that day, I took a selfie (the second picture) and used it as my profile photo. Then I started talking in my Wechat groups (where a lot of my friends can chat with all of us at the same time) and hoping someone's going to notice my profile picture and give me a reaction. This whole process last for 24 hours and on the next noon, I made a post to explain everything and ask for reactions and reflexes. There were few but one challenge I encountered in doing this: the reason I never use selfie as profile photo is that I hate selfie and I very much prefer not to present my face onto social media. So doing this is like "sacrificing" myself.